How do I install the bobbin wound with thread? (For models equipped with a quick-set bobbin)

Why does the lower thread keep breaking?

Combination of fabric, thread and needle

How do I select a pattern, and adjust a stitch width or length?

The thread tension is incorrect.

Why does the needle keep breaking?

How do I draw up the lower thread by hand? (For models equipped with a quick-set bobbin.)

How do I thread my machine? (for models equipped with a needle threader)

How do I wind the bobbin?

Where do I put the oil in my machine?

How do I sew such as vinyl, leather, quilting layers and velvet?